Surprised how the issue of US government in GTA universe isn't emphasized much here besides the issue of militarized police and the like. The US government (
GTA wiki link) there is literally just more of a
friendly face of the organized crime and corporations running the scene - being highly corrupt, incompetent, or downright malignant. Essentially, the US here is a living example of what conspiracy theorists (and popular media) fear it should be, and is.
Just an example in GTA V - its literal equivalent of in-universe version of the CIA (
IAA) and FBI (
FIB) have an inter-service rivalry that would make IJA/IJN look friendly and civil, so desperate enough to get their funding to the point that they've to
shoot out each other to get the hostage they wanted, and one of them considered doing a
bio-weapon version of Operation Northwoods by releasing a major neuro-toxin in a major metropolitan area. We can probably safely assume there could be a Waco-siege equivalent and worse that's gonna be handled
safely and
efficiently by the FIB there somewhere. Not to mention
Merryweather and other US PMC/mercs literally given the green flag to operate on US soil, and we know how that badly went in GTA V.
These videos basically sum up how the US government operates as a whole there.
Back to the point. To make IRL US resemble as much as their GTA versions, just basically make phenomenons and exaggerated headlines of the news
mostly true to what it is, get the US morally as bankrupt as possible, even to the point religion, safety standards (which are almost nil in GTA universe) and the like's affected, and wank crimes all across the US, from simple graft and corruption, to literal deep/shadow state, and organized to unorganized crimes alike. It might need an ASB-intervention for that, but an alternate timeline is still an alternate timeline.
On the other hand, if you want the cool and advanced tech stuff... well... the US basically gets luck and runs their economy so well (despite all the stuff happening in the background) to the point they'd be way more advanced and the like in this timeline. But maybe only the richest, luckiest and best would get them, not to mention society here as a whole is just... US satire reality-wank.
Surprisingly, the US in the GTA-verse has religion and morality that's as bankrupt as expected. Maybe in this TTL the counter-culture and certain other cultural events have a much, much more stronger impact to the point we get to the GTA-verse society full of shenanigans.